Image processing method for light emitting device

Abstract

An image processing method includes the steps of lighting up at least a part of light emitting units of a light emitting device; capturing a plurality of detection images corresponding to a plurality of sections of the light emitting device respectively, wherein each section includes a plurality of lighted-up light emitting units, each detection image includes a plurality of light spots respectively corresponding to the light emitting units of the associated section, and every two adjacent sections have an overlap area including at least one lighted-up light emitting unit; and stitching the detection images of the adjacent sections together by taking the light spots corresponding to at least one lighted-up light emitting unit of the overlap area as alignment reference spots, so that the light emitting statuses of all the light emitting units are presented by a single image.

What is claimed is: 
     
       1. An image processing method for a light emitting device, which uses an image capturing device to capture images of a plurality of light emitting units of the light emitting device; wherein a field of view of the image capturing device is smaller than a distributive range of the light emitting units of the light emitting device; the image processing method comprising the steps of:
 lighting up at least a part of the light emitting units of the light emitting device; 
 using the image capturing device to capture images of a plurality of sections of the light emitting device respectively to obtain a plurality of detection images corresponding to the sections respectively; wherein each of the sections comprises a plurality of the lighted-up light emitting units; each of the detection images comprises a plurality of light spots respectively corresponding to the light emitting units of associated said section; every two adjacent said sections have an overlap area; the overlap area comprises at least one of the lighted-up light emitting units; and 
 stitching the detection images corresponding to the adjacent sections together by taking the light spots corresponding to the at least one of the lighted-up light emitting units of the overlap area as alignment reference spots. 
 
     
     
       2. The image processing method as claimed in  claim 1 , wherein in the step of stitching the detection images, according to at least one of position, brightness and size of the light spots, at least one pair of said light spots, which respectively exist in the detection images corresponding to the adjacent sections and correspond to the same light emitting unit of the overlap area, is determined to serve as the alignment reference spots. 
     
     
       3. The image processing method as claimed in  claim 2 , wherein in the step of stitching the detection images, according to brightness relativity of the light spots, a plurality of pairs of said light spots, in which the light spots of each of the pairs of said light spots respectively exist in the detection images corresponding to the adjacent sections and correspond to the same light emitting unit of the overlap area, are determined to serve as the alignment reference spots. 
     
     
       4. The image processing method as claimed in  claim 3 , wherein the brightness relativity of the light spots comprises differences between brightness values of the light spots. 
     
     
       5. The image processing method as claimed in  claim 4 , wherein the step of stitching the detection images comprises a sub-step of adjusting the brightness values of the light spots of at least a part of the detection images to make the difference between the brightness values of the alignment reference spots, which are included in the detection images corresponding to the adjacent sections and correspond to the same light emitting unit, smaller than a predetermined value. 
     
     
       6. The image processing method as claimed in  claim 5 , wherein a way of adjusting the brightness values of the light spots is to choose one of the light emitting units of the overlap area to be a reference light emitting unit, obtain one of a ratio and the difference between the brightness values of two said light spots corresponding to the reference light emitting unit and included in the detection images corresponding to the adjacent sections, and adjust the brightness values of all the light spots of at least one of the associated detection images according to said one of the ratio and the difference. 
     
     
       7. The image processing method as claimed in  claim 2 , wherein in the step of stitching the detection images, according to brightness values of the light spots, a plurality of pairs of said light spots, in which the light spots of each of the pair of said light spots respectively exist in the detection images corresponding to the adjacent sections and correspond to the same light emitting unit of the overlap area, are determined to serve as the alignment reference spots. 
     
     
       8. The image processing method as claimed in  claim 1 , wherein the step of using the image capturing device to capture the images of the plurality of sections of the light emitting device comprises a sub-step of filtering light emitted from the light emitting units of the light emitting device. 
     
     
       9. An image processing method for a light emitting device, which uses an image capturing device to capture images of a plurality of light emitting units of the light emitting device; wherein a field of view of the image capturing device is smaller than a distributive range of the light emitting units of the light emitting device; the image processing method comprising the steps of:
 lighting up at least a part of the light emitting units of the light emitting device; 
 making the field of view of the image capturing device cover a first section of the light emitting device to shoot the first section by the image capturing device so as to obtain a first detection image; wherein the first section comprises a plurality of the lighted-up light emitting units; the first detection image comprises a plurality of first light spots respectively corresponding to the light emitting units of the first section; 
 making the field of view of the image capturing device cover a second section of the light emitting device to shoot the second section by the image capturing device so as to obtain a second detection image; wherein the second section comprises a plurality of the lighted-up light emitting units; the second detection image comprises a plurality of second light spots respectively corresponding to the light emitting units of the second section; the first section and the second section have an overlap area; the overlap area comprises at least one of the lighted-up light emitting units; and 
 according to at least one of position, brightness and size of the first and second light spots, determining at least one pair of said first and second light spots respectively existing in the first and second detection images and corresponding to the same light emitting unit, and stitching the first and second detection images together by taking said at least one pair of said first and second light spots as alignment reference spots. 
 
     
     
       10. The image processing method as claimed in  claim 9 , wherein in the step of stitching the first and second detection images, according to brightness relativity of the first and second light spots, a plurality of pairs of said first and second light spots, in which the first and second light spots of each of the pairs of said first and second light spots respectively exist in the first and second detection images and correspond to the same light emitting unit, are determined to serve as the alignment reference spots. 
     
     
       11. The image processing method as claimed in  claim 10 , wherein the brightness relativity of the first and second light spots comprises differences between brightness values of the first and second light spots. 
     
     
       12. The image processing method as claimed in  claim 11 , wherein the step of stitching the first and second detection images comprises a sub-step of adjusting the brightness values of the second light spots to make the difference between the brightness values of the alignment reference spots, which are included in the first and second detection images and correspond to the same light emitting unit, smaller than a predetermined value. 
     
     
       13. The image processing method as claimed in  claim 12 , wherein a way of adjusting the brightness values of the second light spots is to choose one of the light emitting units of the overlap area to be a reference light emitting unit, obtain one of a ratio and the difference between the brightness values of the first and second light spots included in the first and second detection images and corresponding to the reference light emitting unit, and adjust the brightness values of the second light spots according to said one of the ratio and the difference. 
     
     
       14. The image processing method as claimed in  claim 9 , wherein in the step of stitching the first and second detection images, according to brightness values of the first and second light spots, a plurality of pairs of said first and second light spots, in which the first and second light spots of each of the pairs of said first and second light spots respectively exist in the first and second detection images and correspond to the same light emitting unit, are determined to serve as the alignment reference spots. 
     
     
       15. The image processing method as claimed in  claim 9 , wherein each of the step of shooting the first section and the step of shooting the second section comprises a sub-step of filtering light emitted from the light emitting units of the light emitting device.